Mermaid Crumpet Rings 5 "Happy" Annette 06 November 2013 These crumpet rings worked very well for me. Yes, they did stick slightly even though I greased them but they did slip out easily by running a small sharp knife along the inside to catch any edges. I expected that as I was making gluten-free crumpets and gluten-free recipes always behave differently. My sister was so impressed with them that she is going to buy some rings herself and have a go too. They were a little bit of effort but well worth it.